GitLab

This CL renames V8EventListener to V8EventListenerOrEventHandler in
order to use callback interface EventListener generated by
event_listener.idl:
https://cs.chromium.org/chromium/src/third_party/blink/renderer/core/dom/events/event_listener.idl?type=cs&q=%22callback+interface+EventListener%22&sq=package:chromium&g=0&l=23
https://dom.spec.whatwg.org/#interface-eventtarget
The generated class will be named as "V8EventListener", so we have to
rename current V8EventListener.

Bug: 872138
Change-Id: Iceaf2e0ccbfb0f0b4be38381b14d79c63d0982af
Reviewed-on: https://chromium-review.googlesource.com/1170670Reviewed-by: Yuki Shiino <yukishiino@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hitoshi Yoshida <peria@chromium.org>
Commit-Queue: Yuki Yamada <yukiy@google.com>
Cr-Commit-Position: refs/heads/master@{#582495}